<?php
namespace Lib\until;

/**
 * 使用方法
 * 引入文件
 * include APP_PATH.'Class/Category.class.php';
 * dump(\Category::unlimitedForLayer($cate));
 */
Class Category {

    /**
     * 组合一维数组
     * @param type $cate 分类数组
     * @param type $html 
     * @param type $pid 父级id
     * @param type $level 等级
     * @return type
     */
    Static Public function unlimitedForLevel($cate, $html = '--', $pid = 0, $level = 0) {
        $arr = array();
        foreach ($cate as $k => $v) {
            if ($v['pid'] == $pid) {
                $v['level'] = $level + 1;
                $v['html'] = str_repeat($html, $level);
                $arr[] = $v;
                $arr = array_merge($arr, self::unlimitedForLevel($cate, $html, $v['id'], $level + 1));
            }
        }
        return $arr;
    }

    //组合多维数组
    Static Public function unlimitedForLayer($cate, $name = 'child', $pid = 0) {
        $arr = array();
        foreach ($cate as $k => $v) {
            if ($v['pid'] == $pid) {
                unset($cate[$k]);
                $v[$name] = self::unlimitedForLayer($cate, $name, $v['id']);
                $arr[] = $v;
            }
        }
        return $arr;
    }

    //传递一个子分类ID返回所有的父级分类  
    Static Public function getParents($cate, $id) {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['id'] == $id) {
                $arr[] = $v;
                $arr = array_merge(self::getParents($cate, $v['pid']), $arr);
            }
        }
        return $arr;
    }

    //传递一个父级分类ID返回所有子分类ID
    Static Public function getChildsId($cate, $pid) {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $arr[] = $v['id'];
                $arr = array_merge($arr, self::getChildsId($cate, $v['id']));
            }
        }
        return $arr;
    }

    //传递一个父级分类ID返回所有子分类
    Static Public function getChilds($cate, $pid) {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $arr[] = $v;
                $arr = array_merge($arr, self::getChilds($cate, $v['id']));
            }
        }
        return $arr;
    }

}

?>